Estimating Guides - Decra Roof Systems

Decra Plus Tile Estimating Guide

  1. The Tables below are for estimating purposes only. The figures quoted are based on nominal tile dimensions and are subject to normal manufacturing tolerances.
  2. Count all fractions of tiles as whole tiles.
  3. The table assume a simple mono-pitch or duo-pitch roof construction. More complicated roof structures will entail an additional wastage. We suggest an additional estimating figure of approx. 1.32 tiles x total linear metres of hips and valleys
Rafter length to suit full
courses of tile including fascia*
Number of tile courses
required
Roof  length using 
barge  covers
Number of tiles 
required
0.330 1                              1.344                       1                        
0.695 2 2.604 2
1.063 3 3.884 3
1.431 4 5.124 4
1.799 5 6.384 5
2.167 6 7.644 6
2.535 7 8.904 7
2.903 8 10.164 8
3.271 9 11.424 9
3.639 10 12.684 10
4.007 11 13.944 11
4.375 12 15.204 12
4.743 13 16.464 13
5.111 14 17.724 14
5.479 15 18.984 15
5.847 16 20.244 16
6.245 17 21.504 17
6.583 18 22.764 18
6.951 19 24.024 19
7.319 20 25.284 20
7.687 21 26.544 21
8.055 22 27.804 22
8.423 23 29.064 23
8.791 24 30.324 24
9.159 25 31.584 25
9.527 26 32.844 26
9.895 27 34.104 27
10.263 28 35.364 28
10.631 29 36.624 29
10.999 30 37.884 30
11.367 31 39.144 31
11.735 32 40.404 32

 

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